World's Cheapest Offshore Wind Farm to Power 600,000 Homes. Sweden's Vattenfall set a world record for the lowest price ever paid for offshore wind power. The state-owned energy company bid EUR 49.9 (or $54) per megawatt-hour to develop the Danish Kriegers Flak, a 600-megawatt offshore wind farm in the Baltic Sea, about 15 kilometers off the Danish island Møn. Kriegers Flak. For comparison, the average cost of offshore wind is around $126 per megawatt-hour.

America’s First Offshore Wind Farm May Power Up a New Industry

A just-completed project off the coast of Rhode Island, though relatively tiny (only enough to power 17,000 homes), is at the forefront of a sea-based transition to renewable energy. (2016-08-23 NYTimes)

Offshore wind farms create 'reef effect' perfect for wildlife

Offshore wind farms create 'reef effect' perfect for marine wildlife - especially seals - “Things like barnacles and mussels will settle on hard structures and then that in turn will attract other marine species and it builds up over time.”